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Updated: Jun 10, 2025
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A Chronic Immobilization Stress Protocol for Inducing Depression-Like Behavior in Mice
Published on: May 15, 2019
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Chronic stress in adulthood results in microvascular dysfunction and subsequent depressive-like behavior
Xiaochen Zhang1,2, Yaru Wang1,2, Song Xue1,2
1Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, 250355, People's Republic of China.
Scientific Reports
|October 14, 2024
Summary
Microvascular dysfunction, not macrovascular, is linked to depression in chronic stress models. Improving microcirculation may offer new depression treatments.
Area of Science:
- Neuroscience
- Cardiovascular Science
- Psychiatry
Background:
- Depression is a common mental disorder with unclear causes and difficult treatments.
- Cardiovascular risk factors are associated with increased depression risk, but vascular injury's role is unknown.
- Understanding vascular contributions is crucial for novel depression therapies.
Purpose of the Study:
- To investigate vascular system function in established animal models of depression.
- To determine if microvascular or macrovascular dysfunction is associated with depression-like behaviors.
- To explore the role of endothelial nitric oxide synthase in depression development.
Main Methods:
- Utilized ultrasonography and laser Doppler measurement in chronic unpredictable mild stress (CUMS), chronic social defeat stress (CSDS), and maternal separation (MS) models.
- Assessed vascular function and depression-like behaviors (anhedonia, despair).
- Examined endothelial nitric oxide synthase-deficient (eNOS+/-) mice.
Main Results:
- Microvascular dysfunction was observed in CUMS and CSDS models, but not MS.
- Microcirculation dysfunction correlated with depression-like behavior and was involved in its development in CUMS and CSDS.
- eNOS+/- mice showed depression-like behavior, preceded by microvascular dysfunction, which was reversible by enhancing nitric oxide.
Conclusions:
- Microvascular dysfunction plays a key role in adult depression induced by chronic stress.
- Targeting microvascular function represents a potential therapeutic strategy for depression.
- This research highlights the link between vascular health and mental well-being.
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